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FINANCIAL INSTRUMENTS (Summary of Notional Amounts) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
4.25% Senior Notes due April 2024 |  |
Derivative [Line Items] |  |
Debt instrument, interest rate | 4.25% |
Debt instrument, maturity date | Apr. 01, 2024 |
3.50% Senior Notes due March 2025 |  |
Derivative [Line Items] |  |
Debt instrument, interest rate | 3.50% |
Debt instrument, maturity date | Mar. 30, 2025 |
3.45% Senior Notes due June 2026 |  |
Derivative [Line Items] |  |
Debt instrument, interest rate | 3.45% |
Debt instrument, maturity date | Jun. 30, 2026 |
Interest Rate Swaps | Fair Value Hedging |  |
Derivative [Line Items] |  |
Notional Amount | $ 1,200 | $ 1,200
Interest Rate Swaps | Fair Value Hedging | 4.25% Senior Notes due April 2024 |  |
Derivative [Line Items] |  |
Notional Amount | 250 | 250
Interest Rate Swaps | Fair Value Hedging | 3.50% Senior Notes due March 2025 |  |
Derivative [Line Items] |  |
Notional Amount | 600 | 600
Interest Rate Swaps | Fair Value Hedging | 3.45% Senior Notes due June 2026 |  |
Derivative [Line Items] |  |
Notional Amount | $ 350 | $ 350

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